It’s only been a few months since the Droid Razr hit stores, but Motorola already has a new version. It isn’t exactly the Droid Razr 2, as most specs are the same as the previous model, but the Droid Razr Maxx does offer some upgrades nonetheless. Chief among those new features is drastically-improved battery life.

You’ll always want to take promised battery life with several grains of salt, but Motorola is saying that the Droid Razr Maxx will give you over 21 hours of talk time. The fine print, however, says that talk time will depend on (among other things) network configuration; this could be an estimate with LTE turned off. Either way, no mention is made of uptime while using data. Any current-gen LTE device is going to struggle to last a day when mobile data is being used.

The improved battery, however, comes at a price. The phone isn’t quite as svelte as its predecessor. The original Droid Razr is only 7.1mm at its thinnest point, but the Razr Maxx adds nearly two millimeters and measures in at 8.9mm. While it’s still a relatively thin handset (it has nearly the same thickness as the Galaxy Nexus), it compromises the first Razr’s biggest strength in order to tackle one of its biggest weaknesses.

Otherwise, the Razr Maxx is the same phone as the original Droid Razr. It still rides on Verizon’s speedy LTE network, with 32GB of total storage (16GB internal, 16GB from an included microSD card), and a 4.3-inch Super AMOLED display. The phone will continue with Verizon’s habit of charging $300 for each new LTE phone. Based on how the pricing pattern has played out so far, you can expect the Droid Razr Maxx to drop to $200 within a month or two of its release.